306,376 research outputs found
SCHIZOGONY IN DIZERINA-ANATOLICA MERIC
No full textFinding of the microspheric individual of Dizerina anatolica Meric containing 6 macrospheric embryos clearly indicates the presence of the schizogonic type reproduction in the Lepidorbitoididae. Location of the haploid macrospheric embryos within the test indicates the generation of these embryos in the rotaloid periembryonic part, and later, their movements toward the periphery of the test
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
The molecular heterogeneity of hemocyanin: structural and functional properties of the 4x6-meric protein of Crustacea.
No full textThe structural properties of the hemocyanin isolated from the Mediterranean mud shrimp, Upogebia pusilla (Decapoda: Thalassinidea), were investigated. Our intent was to make use of the U. pusilla case to perform a structural comparison between crustacean and chelicerate 4 x 6-meric hemocyanins. The thalassinidean hemocyanin appears similar in size but different in structural organization compared to the chelicerate 4 x 6-mer. Ultracentrifiage analyses on the purified protein revealed a sedimentation coefficient of 39S, typical of 4 x 6 hemocyanins. Electron micrographs are in agreement with a model in which four 2 x 6-meric building blocks are arranged in a tetrahedron-like quaternary structure and not in the quasi-square-planar orientation characteristic of the chelicerate protein. Size-exclusion chromatography-fast protein chromatography analysis showed elevated instability of the protein in absence of divalent ions or at pH values higher than 8.0. This analysis also shows that the dissociation of the U. pusilla 4 x 6-meric hemocyanin into hexamers occurs without any intermediate 2 x 6-meric state, in contrast with the dissociation profile of the chelicerate protein exhibiting several dissociation intermediates. The oxygen-binding properties of U. pusilla hemocyanin were studied to disclose possible effects by the typical allosteric effectors that modulate the functional properties of crustacean hemocyanin. A marked Bohr and lactate effect, but no significant influence of urate, on the oxygen affinity of U. pusilla hernocyanin were found
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
The Metadata Education and Research Information Commons (MERIC): A Collaborative Teaching and Research Initiative
No full textArticle dicsussing the Metadata Education and Research Information Commons (MERIC), a collaborative teaching and research initiative
Generation of 2D flood inundation maps of Meric and Tunca Rivers passing through Edirne city center
No full textNatural disasters can be defined as hazardous and usually large scale natural incidents that may cause loss of lifes and property and that occur mainly or completely out of human control. Due to climatic changes draughts are being experienced in various parts of the world in the recent years. Floods are also observed to take place more frequently and severely in some regions. As it is reported by many scientific studies, flood modeling can only be possible through the designation of flood risk management strategies and the determination of the dynamic behaviors of rivers. In this context, the city of Edirne located downstream of Meric River Basin, which runs through Turkish, Bulgarian and Greek soils, is frequently exposed to flooding. The majority of the currents that cause this take place within the Bulgarian borders, which covers 66% of the basin. This part of Meric River Basin has a mountainous geography, it has a rather high average slope of 12.5% within Bulgarian lands, while in Edirne it is quite low with a bottom slope of 0,00036. In the present study, 2D flood modeling of the Meric and Tunca Rivers that passes through Edirne city center were made and flood inundation maps were generated. With the analysis of the results obtained from flood inundation maps, a drainage channel capable of discharging flood rates that exceed the maximum rate Meric River main bed can accommodate was designed, and the downstream conditions of the channel were evaluated
Author, publisher and bookseller : a tripartite synergy in Nigerian book industry
No full textThis work is about the roles of Author, Publisher and Bookseller in Book development in
Nigeria. The paper started by delving into the history of Book Publishing in Nigeria after
which it proceeded by defining who an author, a publisher, and a bookseller is and
expatiated on the indispensable roles of these key actors in Nigerian Book Industry and in
the emerging Information Society. Furthermore, the various constraints to book
development were identified while the paper advised on how the Book Industry can be
further promoted in Nigeria. However, the paper concluded and made recommendations
on how the Book sector can help in enhancing scholarship in the country
[Report to Chief J. E. Curry, by an unknown author #2]
No full textReport to Chief J. E. Curry, by an unknown author. The report contains a list of officers who gave depositions to the United States Attorney
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